Power distribution network power supply and distribution system and method based on energy storage balance

Abstract

The invention relates to the technical field of electric power engineering, in particular to a power distribution network power supply and distribution system and method based on energy storage balance, and is used for solving the problems of poor safety, stability and reliability of a power distribution network caused by single detection means and low accuracy of an energy storage node anomaly detection technology and an energy storage balance control technology of an existing power distribution network. According to the method, the states of the energy storage nodes are monitored in real time, abnormal conditions can be rapidly identified and positioned, then the monitoring energy storage nodes with excellent performance are selected for energy storage balance, the safety and reliability of power grid operation are ensured, meanwhile, balance of energy storage input and output is ensured, energy storage resources are effectively utilized, and the energy storage efficiency is improved. Energy waste or power grid unbalance caused by improper use of stored energy is avoided, the energy utilization efficiency is improved, the overall performance, stability, efficiency and emergency response capability of the power distribution network are greatly improved, energy use is optimized, and safer, more reliable and more efficient power supply service is provided for users.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power engineering, and in particular to a power distribution system and method for a power distribution network based on energy storage balance. Background Art

[0002] With the large-scale access of renewable energy and the continuous growth of electricity demand, the load forecasting and supply and demand balance of distribution networks face new challenges. At present, the input and output balance control of distribution network energy storage mainly relies on preset strategies and rules, which is difficult to adapt to the rapid changes in the distribution network operating environment, resulting in low utilization of energy storage resources and slow response speed, which also aggravates the safety, stability and reliability risks of the distribution network. As the core resource for flexible support of the power grid, the energy storage system plays an increasingly important role in the distribution network. However, the abnormal operation reliability problem of energy storage nodes limits its application in the distribution network and poses a hidden danger to the stability of the distribution network operation.

[0003] However, the existing energy storage node anomaly detection and distribution network energy storage input and output balance control technologies have a single detection method and low accuracy, resulting in poor security, stability and reliability of the distribution network, low utilization of energy storage resources, and difficulty in effectively coping with complex and changing power grid environments. Therefore, it is of great significance to develop a distribution network power supply and distribution system and method based on energy storage balance. Summary of the invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a distribution network power supply and distribution system and method based on energy storage balance, which solves the problem that the existing distribution network energy storage node abnormality detection technology and energy storage balance control technology have a single detection means and low accuracy, resulting in poor safety, stability and reliability of the distribution network.

[0005] The purpose of the present invention can be achieved through the following technical solutions: The distribution network power supply and distribution system based on energy storage balance includes: A power supply and distribution monitoring module, used to obtain power supply and distribution monitoring information of the distribution network, and send the power supply and distribution monitoring information to the monitoring and analysis module; wherein the power supply and distribution monitoring information includes power consumption information HD, user information GH and surplus energy information YN; The specific process of obtaining power supply and distribution monitoring information is as follows: Obtain the total power consumption of the power supply and distribution area of ​​the distribution network on the previous day and the average power consumption of the previous ten days, and mark them as the first power consumption value YH and the second power consumption value EH respectively, quantify the first power consumption value YH and the second power consumption value EH, extract the values ​​of the first power consumption value YH and the second power consumption value EH, and substitute them into the formula for calculation. Obtain power consumption information HD; wherein h1 and h2 are preset proportional coefficients corresponding to the first power consumption value YH and the second power consumption value EH, respectively, and h1 and h2 satisfy h1+h2=1, 0 Obtain all power supply and distribution users in the power supply and distribution area of ​​the distribution network, obtain the number of factories, office buildings, shops and houses among the power supply and distribution users, and mark them as factory value CS, building value LS, shop value PS and house value ZS respectively, quantify the factory value CS, building value LS, shop value PS and house value ZS, extract the values ​​of the factory value CS, building value LS, shop value PS and house value ZS, and substitute them into the formula for calculation. According to the formula Get the household information GH; where g1, g2, g3 and g4 are the preset proportional coefficients corresponding to the factory value CS, building value LS, shop value PS and house value ZS respectively, g1, g2, g3 and g4 satisfy g1+g2+g3+g4=1, 0<g4<g3<g2<g1<1, take g1=0.33, g2=0.27, g3=0.22, g4=0.18; Obtain the remaining electric energy in the distribution network and mark it as remaining energy information YN; Send power consumption information HD, user information GH and remaining energy information YN to the monitoring and analysis module; The monitoring and analysis module is used to obtain the power supply and distribution monitoring coefficient GP according to the power supply and distribution monitoring information, and send the power supply and distribution monitoring coefficient GP to the analysis and judgment module; The specific process of the monitoring and analysis module obtaining the power supply and distribution monitoring coefficient GP is as follows: The power consumption information HD, the user information GH and the surplus energy information YN are normalized, and the values ​​of the power consumption information HD, the user information GH and the surplus energy information YN are quantified according to a preset power supply and distribution monitoring model to obtain a power supply and distribution monitoring coefficient GP; Among them, the power supply and distribution monitoring model is as follows: Where: γ is the preset standard user information, and γ is a mathematical constant; An analysis and judgment module is used to generate an electric energy storage instruction or an electric energy release instruction according to the power supply and distribution monitoring coefficient GP, and send the power supply and distribution monitoring coefficient GP, the electric energy storage instruction and the electric energy release instruction to the energy storage management module; The energy storage management module is used to perform energy storage balancing processing on the distribution network according to the power supply and distribution monitoring coefficient GP, the power storage instruction and the power release instruction; The specific process of the energy storage management module performing energy storage balancing processing is as follows: ​After receiving the power storage instruction, extract the power with the same value as the power supply and distribution monitoring coefficient GP from the remaining power in the distribution network, mark it as stored power, and store the stored power in the qualified energy storage node according to the power input sorting list; After receiving the power release instruction, the released power is extracted from the qualified energy storage nodes according to the power output sorting list, and the value of the released power is the same as the absolute value of the power supply and distribution monitoring coefficient GP, and the released power is supplemented to the distribution network.

[0006] As a further solution of the present invention: the specific process of the analysis and judgment module generating the electric energy storage instruction or the electric energy release instruction is as follows: If the power supply and distribution monitoring coefficient GP>0, an electric energy storage instruction is generated, and the power supply and distribution monitoring coefficient GP and the electric energy storage instruction are sent to the energy storage management module; If the power supply and distribution monitoring coefficient GP≤0, an electric energy release instruction is generated, and the power supply and distribution monitoring coefficient GP and the electric energy release instruction are sent to the energy storage management module.

[0007] As a further solution of the present invention: the power distribution network power supply and distribution system based on energy storage balance also includes: The energy storage node monitoring module is used to obtain the energy storage node monitoring information of the monitoring node o and send the energy storage node monitoring information to the monitoring and analysis module; wherein the energy storage node monitoring information includes energy storage information CN, stability information WD, loss information SH and temperature information WT.

[0008] As a further solution of the present invention: the specific process of the energy storage node monitoring module acquiring the energy storage node monitoring information is as follows: Obtain all energy storage nodes for storing electric energy, and mark them as monitoring nodes o, o=1, ..., v, v is a positive integer, o is the number of any monitoring node, and v is the total number of monitoring nodes; wherein the energy storage nodes include battery packs and supercapacitors; Get the maximum energy storage capacity of monitoring node o and mark it as capacity value RL, get the difference between the maximum energy storage capacity of monitoring node o when it is first used and at the current moment, and mark it as capacity loss value RS, quantify capacity value RL and capacity loss value RS, extract the values ​​of capacity value RL and capacity loss value RS, and substitute them into the formula for calculation. The energy storage information CN is obtained; wherein r1 and r2 are preset proportional coefficients corresponding to the set capacity value RL and the capacity loss value RS, respectively, r1 and r2 satisfy r1+r2=1, 0<r2<r1<1, and r1=0.63 and r2=0.37; Obtain the average voltage and rated input voltage of the most recent power input process of the monitoring node o, obtain the difference between the two, and mark it as the input pressure value RY; obtain the average voltage and rated output voltage of the most recent power output process of the monitoring node o, obtain the difference between the two, and mark it as the output pressure value CY; quantify the input pressure value RY and the output pressure value CY, extract the values ​​of the input pressure value RY and the output pressure value CY, and substitute them into the formula for calculation; according to the formula Get the voltage value DU, get the average current and rated input current of the most recent power input process of the monitoring node o, get the difference between the two, and mark it as the inflow value RR, get the average current and rated output current of the most recent power output process of the monitoring node o, get the difference between the two, and mark it as the outflow value CL, quantize the inflow value RR and the outflow value CL, extract the values ​​of the inflow value RR and the outflow value CL, and substitute them into the formula for calculation. According to the formula Get the current value DI, quantize the voltage value DU and the current value DI, extract the values ​​of the voltage value DU and the current value DI, and substitute them into the formula for calculation. Get stable information WD; wherein u1 and u2 are respectively preset proportional coefficients corresponding to the set input pressure value RY and output pressure value CY, u1 and u2 satisfy u1+u2=1, 0<u2<u1<1, and u1=0.55 and u2=0.45; wherein i1 and i2 are respectively preset proportional coefficients corresponding to the set input flow value RR and output flow value CL, i1 and i2 satisfy i1+i2=1, 0<i2<i1<1, and i1=0.59 and i2=0.41; wherein w1 and w2 are respectively preset proportional coefficients corresponding to the set voltage value DU and current value DI, w1 and w2 satisfy w1+w2=1, 0<w1<w2<1, and w1=0.43 and w2=0.57; Obtain the storage capacity of the monitoring node o at the time of the most recent full charge, and mark it as the initial storage value CC; obtain the storage capacity of the monitoring node o after a preset time from the time of the most recent full charge, and mark it as the pre-storage value YC; quantify the initial storage value CC and the pre-storage value YC, extract the values ​​of the initial storage value CC and the pre-storage value YC, and substitute them into the formula for calculation; according to the formula Obtain loss information SH; Get the real-time temperature of the monitoring node o and mark it as temperature information WT; The energy storage information CN, stability information WD, loss information SH and temperature information WT are sent to the monitoring and analysis module.

[0009] As a further solution of the present invention: the monitoring and analysis module is also used to obtain the energy storage node monitoring coefficient CJo according to the energy storage node monitoring information, and send the energy storage node monitoring coefficient CJo to the analysis and judgment module.

[0010] As a further solution of the present invention: the specific process of the monitoring and analysis module obtaining the energy storage node monitoring coefficient CJo is as follows: The energy storage information CN, stability information WD, loss information SH and temperature information WT are normalized, and the values ​​of the energy storage information CN, stability information WD, loss information SH and temperature information WT are quantified according to a preset energy storage node monitoring model to obtain an energy storage node monitoring coefficient CJo; Among them, the energy storage node monitoring model is as follows: Where: η is the preset error adjustment factor, taking η=0.949; Both π and e are mathematical constants; κ1, κ2, κ3 and κ4 are respectively the preset weight factors corresponding to the set energy storage information CN, stability information WD, loss information SH and temperature information WT, κ1, κ2, κ3 and κ4 satisfy κ2>κ3>κ1>κ4>1.429, and κ1=1.98, κ2=2.87, κ3=2.25, κ4=1.63; The energy storage node monitoring coefficient CJo is sent to the analysis and judgment module.

[0011] As a further solution of the present invention: the analysis and judgment module is also used to classify the monitoring node o as an unqualified energy storage node or a qualified energy storage node according to the energy storage node monitoring coefficient CJo, and send the unqualified energy storage node or the qualified energy storage node to the energy storage management module.

[0012] As a further solution of the present invention: the specific process of the analysis and judgment module classifying the monitoring node o is as follows: The energy storage node monitoring coefficient CJo is compared with the preset energy storage node monitoring threshold CJy, and the comparison results are as follows: If the energy storage node monitoring coefficient CJo> the energy storage node monitoring threshold CJy, the monitoring node o corresponding to the energy storage node monitoring coefficient CJo is marked as an unqualified energy storage node, and the unqualified energy storage node is sent to the energy storage management module; If the energy storage node monitoring coefficient CJo≤energy storage node monitoring threshold CJy, the monitoring node o corresponding to the energy storage node monitoring coefficient CJo is marked as a qualified energy storage node, and the qualified energy storage node is sent to the energy storage management module.

[0013] As a further solution of the present invention: the energy storage management module is also used to control unqualified energy storage nodes to stop running, and form an electric energy input ranking list and an electric energy output ranking list according to qualified energy storage nodes.

[0014] As a further solution of the present invention: the specific process of the energy storage management module's power input sorting list and power output sorting list is as follows: After receiving the unqualified energy storage node, control the unqualified energy storage node to stop running; All qualified energy storage nodes are sorted in ascending order according to the energy storage node monitoring coefficient CJo to form an electric energy input sorting list, and all qualified energy storage nodes are sorted in descending order according to the energy storage node monitoring coefficient CJo to form an electric energy output sorting list.

[0015] As a further solution of the present invention: a power distribution method for a distribution network based on energy storage balance comprises the following steps: Step S1: the energy storage node monitoring module obtains the energy storage node monitoring information of the monitoring node o, wherein the energy storage node monitoring information includes energy storage information CN, stability information WD, loss information SH and temperature information WT, and sends the energy storage node monitoring information to the monitoring and analysis module; Step S2: The monitoring and analysis module obtains the energy storage node monitoring coefficient CJo according to the energy storage node monitoring information, and sends the energy storage node monitoring coefficient CJo to the analysis and judgment module; Step S3: The analysis and judgment module classifies the monitoring node o as an unqualified energy storage node or a qualified energy storage node according to the energy storage node monitoring coefficient CJo, and sends the unqualified energy storage node or the qualified energy storage node to the energy storage management module; Step S4: the energy storage management module controls the unqualified energy storage nodes to stop running, and forms an energy input ranking list and an energy output ranking list according to the qualified energy storage nodes; Step S5: the power supply and distribution monitoring module obtains the power supply and distribution monitoring information of the distribution network, wherein the power supply and distribution monitoring information includes power consumption information HD, user information GH and surplus energy information YN, and sends the power supply and distribution monitoring information to the monitoring and analysis module; Step S6: the monitoring and analysis module obtains the power supply and distribution monitoring coefficient GP according to the power supply and distribution monitoring information, and sends the power supply and distribution monitoring coefficient GP to the analysis and judgment module; Step S7: the analysis and judgment module generates an electric energy storage instruction or an electric energy release instruction according to the power supply and distribution monitoring coefficient GP, and sends the power supply and distribution monitoring coefficient GP, the electric energy storage instruction and the electric energy release instruction to the energy storage management module; Step S8: The energy storage management module performs energy storage balancing processing on the distribution network according to the power supply and distribution monitoring coefficient GP, the power storage instruction and the power release instruction.

[0016] Beneficial effects of the present invention: The power supply and distribution system and method of the distribution network based on energy storage balance of the present invention first collects data from the monitoring nodes to obtain the monitoring information of the energy storage nodes, and then uses the data analysis technology to obtain the monitoring coefficient of the energy storage nodes based on the monitoring information of the energy storage nodes to comprehensively measure the quality of the monitoring nodes, and the larger the monitoring coefficient of the energy storage nodes, the higher the abnormality, and the worse the quality of the monitoring nodes. Finally, data is collected from the distribution network to obtain the power supply and distribution monitoring information, and then the power supply and distribution monitoring coefficient obtained from the power supply and distribution monitoring information using the data analysis technology can be used to determine whether the electric energy in the power supply and distribution is surplus or insufficient, and finally the electric energy input sorting list and the electric energy output sorting list are used to transfer or supplement the electric energy in the distribution network to achieve energy storage balance; The distribution network power supply and distribution system and method based on energy storage balance of the present invention can quickly identify and locate abnormal situations by real-time monitoring the status of energy storage nodes, and then select monitoring energy storage nodes with excellent performance to perform energy storage balance, thereby ensuring the safety and reliability of power grid operation, while ensuring the balance of energy storage input and output, effectively utilizing energy storage resources, avoiding energy waste or power grid imbalance caused by improper use of energy storage, improving energy utilization efficiency, greatly improving the overall performance, stability, efficiency and emergency response capability of the distribution network, optimizing energy use, and providing users with safer, more reliable and efficient power supply services. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a principle block diagram of the power distribution network power supply and distribution system based on energy storage balance in the present invention; Figure 2 It is a flow chart of the power supply and distribution method of the distribution network based on energy storage balance in the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1 As shown, this embodiment is a power supply and distribution system of a distribution network based on energy storage balance, including the following modules: an energy storage node monitoring module, a monitoring and analysis module, an analysis and judgment module, an energy storage management module, and a power supply and distribution monitoring module; The energy storage node monitoring module is used to obtain the energy storage node monitoring information of the monitoring node o, and send the energy storage node monitoring information to the monitoring and analysis module; wherein the energy storage node monitoring information includes energy storage information CN, stability information WD, loss information SH and temperature information WT; Among them, the monitoring and analysis module is used to obtain the energy storage node monitoring coefficient CJo according to the energy storage node monitoring information, and send the energy storage node monitoring coefficient CJo to the analysis and judgment module; it is also used to obtain the power supply and distribution monitoring coefficient GP according to the power supply and distribution monitoring information, and send the power supply and distribution monitoring coefficient GP to the analysis and judgment module; Among them, the analysis and judgment module is used to classify the monitoring node o as an unqualified energy storage node or a qualified energy storage node according to the energy storage node monitoring coefficient CJo, and send the unqualified energy storage node or the qualified energy storage node to the energy storage management module; it is also used to generate an energy storage instruction or an energy release instruction according to the power supply and distribution monitoring coefficient GP, and send the power supply and distribution monitoring coefficient GP, the energy storage instruction and the energy release instruction to the energy storage management module; The energy storage management module is used to control unqualified energy storage nodes to stop running, and to form an energy input ranking list and an energy output ranking list according to qualified energy storage nodes; it is also used to perform energy storage balancing processing on the distribution network according to the power supply and distribution monitoring coefficient GP, energy storage instructions and energy release instructions; The power supply and distribution monitoring module is used to obtain the power supply and distribution monitoring information of the distribution network and send the power supply and distribution monitoring information to the monitoring and analysis module; wherein the power supply and distribution monitoring information includes power consumption information HD, user information GH and surplus energy information YN.

[0021] Example 2: Please refer to Figure 2 As shown, this embodiment is a power distribution method for a distribution network based on energy storage balance, comprising the following steps: Step S1: the energy storage node monitoring module obtains the energy storage node monitoring information of the monitoring node o, wherein the energy storage node monitoring information includes energy storage information CN, stability information WD, loss information SH and temperature information WT, and sends the energy storage node monitoring information to the monitoring and analysis module; Step S2: The monitoring and analysis module obtains the energy storage node monitoring coefficient CJo according to the energy storage node monitoring information, and sends the energy storage node monitoring coefficient CJo to the analysis and judgment module; Step S3: The analysis and judgment module classifies the monitoring node o as an unqualified energy storage node or a qualified energy storage node according to the energy storage node monitoring coefficient CJo, and sends the unqualified energy storage node or the qualified energy storage node to the energy storage management module; Step S4: the energy storage management module controls the unqualified energy storage nodes to stop running, and forms an energy input ranking list and an energy output ranking list according to the qualified energy storage nodes; Step S5: the power supply and distribution monitoring module obtains the power supply and distribution monitoring information of the distribution network, wherein the power supply and distribution monitoring information includes power consumption information HD, user information GH and surplus energy information YN, and sends the power supply and distribution monitoring information to the monitoring and analysis module; Step S6: the monitoring and analysis module obtains the power supply and distribution monitoring coefficient GP according to the power supply and distribution monitoring information, and sends the power supply and distribution monitoring coefficient GP to the analysis and judgment module; Step S7: the analysis and judgment module generates an electric energy storage instruction or an electric energy release instruction according to the power supply and distribution monitoring coefficient GP, and sends the power supply and distribution monitoring coefficient GP, the electric energy storage instruction and the electric energy release instruction to the energy storage management module; Step S8: The energy storage management module performs energy storage balancing processing on the distribution network according to the power supply and distribution monitoring coefficient GP, the power storage instruction and the power release instruction.

[0022] Embodiment 3: Based on any of the above embodiments, Embodiment 3 of the present invention is an energy storage node monitoring module. The function of the energy storage node monitoring module is to obtain energy storage node monitoring information, wherein the energy storage node monitoring information includes energy storage information CN, stability information WD, loss information SH and temperature information WT. The specific process is as follows: The energy storage node monitoring module obtains all energy storage nodes for storing electric energy, and marks them as monitoring nodes o in sequence, where o=1, ..., v, v is a positive integer, o is the number of any monitoring node, and v is the total number of monitoring nodes; wherein the energy storage nodes include battery packs and supercapacitors; The energy storage node monitoring module obtains the maximum energy storage capacity of the monitoring node o and marks it as the capacity value RL, obtains the difference between the maximum energy storage capacity of the monitoring node o when it is first used and at the current moment, and marks it as the capacity loss value RS, quantifies the capacity value RL and the capacity loss value RS, extracts the values ​​of the capacity value RL and the capacity loss value RS, and substitutes them into the formula for calculation. The energy storage information CN is obtained; wherein r1 and r2 are preset proportional coefficients corresponding to the set capacity value RL and the capacity loss value RS, respectively, r1 and r2 satisfy r1+r2=1, 0<r2<r1<1, and r1=0.63 and r2=0.37; The energy storage node monitoring module obtains the average voltage and rated input voltage of the monitoring node o during the most recent power input process, obtains the difference between the two, and marks it as the input pressure value RY, obtains the average voltage and rated output voltage of the monitoring node o during the most recent power output process, obtains the difference between the two, and marks it as the output pressure value CY, quantifies the input pressure value RY and the output pressure value CY, extracts the values ​​of the input pressure value RY and the output pressure value CY, and substitutes them into the formula for calculation. According to the formula Get the voltage value DU, get the average current and rated input current of the most recent power input process of the monitoring node o, get the difference between the two, and mark it as the inflow value RR, get the average current and rated output current of the most recent power output process of the monitoring node o, get the difference between the two, and mark it as the outflow value CL, quantize the inflow value RR and the outflow value CL, extract the values ​​of the inflow value RR and the outflow value CL, and substitute them into the formula for calculation. According to the formula Get the current value DI, quantize the voltage value DU and the current value DI, extract the values ​​of the voltage value DU and the current value DI, and substitute them into the formula for calculation. Get stable information WD; wherein u1 and u2 are respectively preset proportional coefficients corresponding to the set input pressure value RY and output pressure value CY, u1 and u2 satisfy u1+u2=1, 0<u2<u1<1, and u1=0.55 and u2=0.45; wherein i1 and i2 are respectively preset proportional coefficients corresponding to the set input flow value RR and output flow value CL, i1 and i2 satisfy i1+i2=1, 0<i2<i1<1, and i1=0.59 and i2=0.41; wherein w1 and w2 are respectively preset proportional coefficients corresponding to the set voltage value DU and current value DI, w1 and w2 satisfy w1+w2=1, 0<w1<w2<1, and w1=0.43 and w2=0.57; The energy storage node monitoring module obtains the storage capacity of the monitoring node o at the time of the most recent full energy charge, and marks it as the initial storage value CC, obtains the storage capacity of the monitoring node o after a preset time since the most recent full energy charge, and marks it as the pre-storage value YC, quantifies the initial storage value CC and the pre-storage value YC, extracts the values ​​of the initial storage value CC and the pre-storage value YC, and substitutes them into the formula for calculation. Obtain loss information SH; The energy storage node monitoring module obtains the real-time temperature of the monitoring node o and marks it as temperature information WT; The energy storage node monitoring module sends the energy storage information CN, stability information WD, loss information SH and temperature information WT to the monitoring and analysis module.

[0023] Embodiment 4: Based on any of the above embodiments, Embodiment 4 of the present invention is a monitoring and analysis module, which has two functions; One of the functions is to obtain the energy storage node monitoring coefficient CJo. The specific process is as follows: The monitoring and analysis module normalizes the energy storage information CN, stability information WD, loss information SH and temperature information WT, and quantifies the values ​​of the energy storage information CN, stability information WD, loss information SH and temperature information WT according to the preset energy storage node monitoring model to obtain the energy storage node monitoring coefficient CJo; Among them, the energy storage node monitoring model is as follows: Where: η is the preset error adjustment factor, taking η=0.949; Both π and e are mathematical constants; κ1, κ2, κ3 and κ4 are respectively the preset weight factors corresponding to the set energy storage information CN, stability information WD, loss information SH and temperature information WT, κ1, κ2, κ3 and κ4 satisfy κ2>κ3>κ1>κ4>1.429, and κ1=1.98, κ2=2.87, κ3=2.25, κ4=1.63; The monitoring and analysis module sends the energy storage node monitoring coefficient CJo to the analysis and judgment module; The second function is to obtain the power supply and distribution monitoring coefficient GP. The specific process is as follows: The monitoring and analysis module normalizes the power consumption information HD, the user information GH and the surplus energy information YN, and quantifies the values ​​of the power consumption information HD, the user information GH and the surplus energy information YN according to the preset power supply and distribution monitoring model to obtain the power supply and distribution monitoring coefficient GP; Among them, the power supply and distribution monitoring model is as follows: Where: γ is the preset standard user information, and γ is a mathematical constant; The monitoring and analysis module sends the power supply and distribution monitoring coefficient GP to the analysis and judgment module.

[0024] Embodiment 5: Based on any of the above embodiments, Embodiment 5 of the present invention is an analysis and judgment module, which has two functions: One of the functions is to classify the monitoring node o. The specific process is as follows: The analysis and judgment module compares the energy storage node monitoring coefficient CJo with the preset energy storage node monitoring threshold CJy. The comparison results are as follows: If the energy storage node monitoring coefficient CJo> the energy storage node monitoring threshold CJy, the monitoring node o corresponding to the energy storage node monitoring coefficient CJo is marked as an unqualified energy storage node, and the unqualified energy storage node is sent to the energy storage management module; If the energy storage node monitoring coefficient CJo ≤ the energy storage node monitoring threshold CJy, the monitoring node o corresponding to the energy storage node monitoring coefficient CJo is marked as a qualified energy storage node, and the qualified energy storage node is sent to the energy storage management module; The second function is to generate power storage instructions or power release instructions. The specific process is as follows: If the power supply and distribution monitoring coefficient GP>0, an electric energy storage instruction is generated, and the power supply and distribution monitoring coefficient GP and the electric energy storage instruction are sent to the energy storage management module; If the power supply and distribution monitoring coefficient GP≤0, an electric energy release instruction is generated, and the power supply and distribution monitoring coefficient GP and the electric energy release instruction are sent to the energy storage management module.

[0025] Embodiment 6: Based on any of the above embodiments, Embodiment 6 of the present invention is an energy storage management module, and the energy storage management module has two functions; One of the functions is to obtain the power input sorting list and the power output sorting list. The specific process is as follows: After receiving the unqualified energy storage node, the energy storage management module controls the unqualified energy storage node to stop running; The energy storage management module sorts all qualified energy storage nodes according to the energy storage node monitoring coefficient CJo from small to large to form an energy input sorting list, and sorts all qualified energy storage nodes according to the energy storage node monitoring coefficient CJo from large to small to form an energy output sorting list; The second function is to store energy and balance the distribution network. The specific process is as follows: After receiving the electric energy storage instruction, the energy storage management module extracts electric energy with the same value as the power supply and distribution monitoring coefficient GP from the remaining electric energy in the distribution network, marks it as stored electric energy, and stores the stored electric energy in the qualified energy storage node according to the electric energy input sorting list; After receiving the power release instruction, the energy storage management module extracts the released power from the qualified energy storage nodes according to the power output sorting list, and the value of the released power is the same as the absolute value of the power supply and distribution monitoring coefficient GP, and the released power is supplemented to the distribution network.

[0026] Embodiment 7: Based on any of the above embodiments, Embodiment 7 of the present invention is a power supply and distribution monitoring module. The function of the power supply and distribution monitoring module is to obtain power supply and distribution monitoring information, wherein the power supply and distribution monitoring information includes power consumption information HD, user information GH and surplus energy information YN. The specific process is as follows: The power supply and distribution monitoring module obtains the total power consumption of the power supply and distribution area of ​​the distribution network on the previous day and the average power consumption of the previous ten days, and marks them as the first power consumption value YH and the second power consumption value EH respectively, quantifies the first power consumption value YH and the second power consumption value EH, extracts the values ​​of the first power consumption value YH and the second power consumption value EH, and substitutes them into the formula for calculation. Obtain power consumption information HD; wherein h1 and h2 are preset proportional coefficients corresponding to the first power consumption value YH and the second power consumption value EH, respectively, and h1 and h2 satisfy h1+h2=1, 0 ​The power supply and distribution monitoring module obtains all power supply and distribution users in the power supply and distribution area of ​​the distribution network, obtains the number of factories, office buildings, shops and residences among the power supply and distribution users, and marks them as factory value CS, building value LS, shop value PS and house value ZS respectively, quantifies the factory value CS, building value LS, shop value PS and house value ZS, extracts the values ​​of the factory value CS, building value LS, shop value PS and house value ZS, and substitutes them into the formula for calculation. According to the formula Get the household information GH; where g1, g2, g3 and g4 are the preset proportional coefficients corresponding to the factory value CS, building value LS, shop value PS and house value ZS respectively, g1, g2, g3 and g4 satisfy g1+g2+g3+g4=1, 0<g4<g3<g2<g1<1, take g1=0.33, g2=0.27, g3=0.22, g4=0.18; The power supply and distribution monitoring module obtains the remaining electric energy in the distribution network and marks it as the remaining energy information YN; The power supply and distribution monitoring module sends the power consumption information HD, user information GH and surplus energy information YN to the monitoring and analysis module.

[0027] Based on the above embodiments 1-7, the working principle of the present invention is as follows: The power distribution network power supply and distribution system and method based on energy storage balance of the present invention obtains energy storage node monitoring information of the monitoring node through the energy storage node monitoring module, wherein the energy storage node monitoring information includes energy storage information, stability information, loss information and temperature information, obtains the energy storage node monitoring coefficient according to the energy storage node monitoring information through the monitoring analysis module, classifies the monitoring node into an unqualified energy storage node or a qualified energy storage node according to the energy storage node monitoring coefficient through the analysis and judgment module, controls the unqualified energy storage node to stop running through the energy storage management module, and forms an energy input queue according to the qualified energy storage node. The system obtains the power supply and distribution monitoring information of the distribution network through the power supply and distribution monitoring module, wherein the power supply and distribution monitoring information includes power consumption information, user information and surplus energy information, obtains the power supply and distribution monitoring coefficient according to the power supply and distribution monitoring information through the monitoring and analysis module, generates power storage instructions or power release instructions according to the power supply and distribution monitoring coefficient through the analysis and judgment module, and performs energy storage balancing processing on the distribution network according to the power supply and distribution monitoring coefficient, power storage instructions and power release instructions through the energy storage management module; the system first collects data on the monitoring nodes, obtains the energy storage nodes Monitoring information, and then using data analysis technology to obtain the energy storage node monitoring coefficient based on the energy storage node monitoring information can comprehensively measure the quality of the monitoring node, and the larger the energy storage node monitoring coefficient, the higher the abnormality, and at the same time, the worse the quality of the monitoring node. Finally, data collection is performed on the distribution network to obtain power supply and distribution monitoring information. Then, using data analysis technology to obtain the power supply and distribution monitoring coefficient based on the power supply and distribution monitoring information, it can be determined whether the power in the power supply and distribution is surplus or insufficient. Finally, the power input sorting list and the power output sorting list are used to transfer or supplement the power in the distribution network to achieve energy storage balance; this method can quickly identify and locate abnormal situations by real-time monitoring of the status of energy storage nodes, and then select monitoring energy storage nodes with excellent performance for energy storage balance, ensuring the safety and reliability of power grid operation, while ensuring the balance of energy storage input and output, effectively utilizing energy storage resources, avoiding energy waste or power grid imbalance caused by improper use of energy storage, improving energy utilization efficiency, greatly improving the overall performance, stability, efficiency and emergency response capability of the distribution network, optimizing energy use, and providing users with safer, more reliable and efficient power supply services.

[0028] It should be further explained that the above formulas are obtained by collecting a large amount of data and performing software simulation, and a formula close to the actual value is selected. The coefficients in the formula are set by technical personnel in this field according to actual conditions.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined in this application, they shall all fall within the protection scope of the present invention.

Claims

1. A power distribution network system based on energy storage balance, characterized in that: include: A power supply and distribution monitoring module, used to obtain power supply and distribution monitoring information of the distribution network, and send the power supply and distribution monitoring information to the monitoring and analysis module; wherein the power supply and distribution monitoring information includes power consumption information HD, user information GH and surplus energy information YN; The specific process of obtaining power supply and distribution monitoring information is as follows: Obtain the total power consumption of the power supply and distribution area of ​​the distribution network in the previous day and the average power consumption in the previous ten days, and mark them as the first power consumption value YH and the second power consumption value EH respectively. Quantify the first power consumption value YH and the second power consumption value EH according to the formula Obtain power consumption information HD; wherein h1 and h2 are preset proportional coefficients corresponding to the set first power consumption value YH and the second power consumption value EH respectively; Obtain all power supply and distribution users in the power supply and distribution area of ​​the distribution network, obtain the number of factories, office buildings, shops and houses among the power supply and distribution users, and mark them as factory value CS, building value LS, shop value PS and house value ZS respectively, quantify the factory value CS, building value LS, shop value PS and house value ZS, and use the formula The user information GH is obtained; wherein g1, g2, g3 and g4 are respectively the preset proportional coefficients corresponding to the set factory value CS, building value LS, shop value PS and house value ZS; Obtain the remaining electric energy in the distribution network and mark it as remaining energy information YN; Send power consumption information HD, user information GH and surplus energy information YN to the monitoring and analysis module; The monitoring and analysis module is used to obtain the power supply and distribution monitoring coefficient GP according to the power supply and distribution monitoring information, and send the power supply and distribution monitoring coefficient GP to the analysis and judgment module; The specific process of the monitoring and analysis module obtaining the power supply and distribution monitoring coefficient GP is as follows: The values ​​of the power consumption information HD, the user information GH and the surplus energy information YN are quantified and calculated according to the preset power supply and distribution monitoring model to obtain the power supply and distribution monitoring coefficient GP; Among them, the power supply and distribution monitoring model is as follows: Where: γ is the preset standard user information, and γ is a mathematical constant; An analysis and judgment module is used to generate an electric energy storage instruction or an electric energy release instruction according to the power supply and distribution monitoring coefficient GP, and send the power supply and distribution monitoring coefficient GP, the electric energy storage instruction and the electric energy release instruction to the energy storage management module; The energy storage management module is used to perform energy storage balancing processing on the distribution network according to the power supply and distribution monitoring coefficient GP, the power storage instruction and the power release instruction; The specific process of the energy storage management module performing energy storage balancing processing is as follows: After receiving the power storage instruction, extract the power with the same value as the power supply and distribution monitoring coefficient GP from the remaining power in the distribution network, mark it as stored power, and store the stored power in the qualified energy storage node according to the power input sorting list; After receiving the power release instruction, the released power is extracted from the qualified energy storage nodes according to the power output sorting list, and the value of the released power is the same as the absolute value of the power supply and distribution monitoring coefficient GP, and the released power is supplemented to the distribution network.

2. The power distribution network power supply and distribution system based on energy storage balance according to claim 1 is characterized in that: The specific process of the analysis and judgment module generating an electric energy storage instruction or an electric energy release instruction is as follows: If the power supply and distribution monitoring coefficient GP>0, an electric energy storage instruction is generated, and the power supply and distribution monitoring coefficient GP and the electric energy storage instruction are sent to the energy storage management module; If the power supply and distribution monitoring coefficient GP≤0, an electric energy release instruction is generated, and the power supply and distribution monitoring coefficient GP and the electric energy release instruction are sent to the energy storage management module.

3. The power distribution network power supply and distribution system based on energy storage balance according to claim 1, characterized in that: Also includes: The energy storage node monitoring module is used to obtain the energy storage node monitoring information of the monitoring node o and send the energy storage node monitoring information to the monitoring and analysis module; wherein the energy storage node monitoring information includes energy storage information CN, stability information WD, loss information SH and temperature information WT.

4. The power distribution network power supply and distribution system based on energy storage balance according to claim 3 is characterized in that: The specific process of the energy storage node monitoring module obtaining energy storage node monitoring information is as follows: Obtain all energy storage nodes for storing electric energy, and mark them as monitoring nodes o, o=1, ..., v, v is a positive integer, o is the number of any monitoring node, and v is the total number of monitoring nodes; Get the maximum energy storage capacity of monitoring node o and mark it as capacity value RL. Get the difference between the maximum energy storage capacity of monitoring node o when it is first used and at the current moment and mark it as capacity loss value RS. Quantify capacity value RL and capacity loss value RS. The energy storage information CN is obtained; wherein r1 and r2 are preset proportional coefficients corresponding to the set capacity value RL and the capacity loss value RS respectively; Get the average voltage and rated input voltage of the most recent power input process of the monitoring node o, get the difference between the two, and mark it as the input pressure value RY; get the average voltage and rated output voltage of the most recent power output process of the monitoring node o, get the difference between the two, and mark it as the output pressure value CY; quantify the input pressure value RY and the output pressure value CY according to the formula Get the voltage value DU, get the average current and rated input current of the most recent power input process of the monitoring node o, get the difference between the two, and mark it as the inflow value RR, get the average current and rated output current of the most recent power output process of the monitoring node o, get the difference between the two, and mark it as the outflow value CL, quantify the inflow value RR and the outflow value CL, according to the formula Get the current value DI, quantize the voltage value DU and the current value DI, according to the formula Obtain stability information WD; wherein u1 and u2 are respectively preset proportional coefficients corresponding to the set input pressure value RY and output pressure value CY; wherein i1 and i2 are respectively preset proportional coefficients corresponding to the set input current value RR and output current value CL; wherein w1 and w2 are respectively preset proportional coefficients corresponding to the set voltage value DU and current value DI; Obtain the storage capacity of the monitoring node o at the time of the most recent full charge, and mark it as the initial storage value CC. Obtain the storage capacity of the monitoring node o after a preset time from the time of the most recent full charge, and mark it as the pre-storage value YC. Quantify the initial storage value CC and pre-storage value YC according to the formula Obtain loss information SH; Get the real-time temperature of the monitoring node o and mark it as temperature information WT; The energy storage information CN, stability information WD, loss information SH and temperature information WT are sent to the monitoring and analysis module.

5. The power distribution network power supply and distribution system based on energy storage balance according to claim 1, characterized in that: The monitoring and analysis module is also used to obtain the energy storage node monitoring coefficient CJo according to the energy storage node monitoring information, and send the energy storage node monitoring coefficient CJo to the analysis and judgment module.

6. The power distribution network power supply and distribution system based on energy storage balance according to claim 5, characterized in that: The specific process of the monitoring and analysis module obtaining the energy storage node monitoring coefficient CJo is as follows: The values ​​of energy storage information CN, stability information WD, loss information SH and temperature information WT are quantified according to the preset energy storage node monitoring model to obtain the energy storage node monitoring coefficient CJo; Among them, the energy storage node monitoring model is as follows: Where: η is the preset error adjustment factor; Both π and e are mathematical constants; κ1, κ2, κ3 and κ4 are preset weight factors corresponding to the set energy storage information CN, stability information WD, loss information SH and temperature information WT respectively; The energy storage node monitoring coefficient CJo is sent to the analysis and judgment module.

7. The power distribution network power supply and distribution system based on energy storage balance according to claim 1, characterized in that: The analysis and judgment module is also used to classify the monitoring node o as an unqualified energy storage node or a qualified energy storage node according to the energy storage node monitoring coefficient CJo, and send the unqualified energy storage node or the qualified energy storage node to the energy storage management module.

8. The power distribution network power supply and distribution system based on energy storage balance according to claim 7 is characterized in that: The specific process of the analysis and judgment module classifying the monitoring node o is as follows: The energy storage node monitoring coefficient CJo is compared with the preset energy storage node monitoring threshold CJy, and the comparison results are as follows: If the energy storage node monitoring coefficient CJo> the energy storage node monitoring threshold CJy, the monitoring node o corresponding to the energy storage node monitoring coefficient CJo is marked as an unqualified energy storage node, and the unqualified energy storage node is sent to the energy storage management module; If the energy storage node monitoring coefficient CJo≤energy storage node monitoring threshold CJy, the monitoring node o corresponding to the energy storage node monitoring coefficient CJo is marked as a qualified energy storage node, and the qualified energy storage node is sent to the energy storage management module.

9. The power distribution network power supply and distribution system based on energy storage balance according to claim 1, characterized in that: The energy storage management module is also used to control unqualified energy storage nodes to stop running, and form an energy input ranking list and an energy output ranking list according to qualified energy storage nodes; The specific process of the energy storage management module's power input sorting list and power output sorting list is as follows: After receiving the unqualified energy storage node, control the unqualified energy storage node to stop running; All qualified energy storage nodes are sorted in ascending order according to the energy storage node monitoring coefficient CJo to form an electric energy input sorting list, and all qualified energy storage nodes are sorted in descending order according to the energy storage node monitoring coefficient CJo to form an electric energy output sorting list.

10. A power distribution method for a distribution network based on energy storage balance, characterized in that: A distribution network power supply and distribution system based on energy storage balance as described in any one of claims 1 to 9 above.

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